Sulfur is rarely found pure in the ground. It is an impurity which is removed from fossil fuels because it causes acid rain when fossil fuels are burned.

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IN the realm of pure chemistry, few better examples than the chemical change between sulphur dioxide and oxygen can be selected to illustrate the general principles involved in gas reactions, whilst ...

As well as being a strong acid, sulfuric acid is also a dehydrating agent, meaning it is very good at removing water from other substances. There are two examples you need to be aware of.